ICTAL RECORDINGS OF AMBULATORY CASSETTE EEG WITH SPHENOIDAL ELECTRODES IN TEMPORAL-LOBE EPILEPSY - COMPARISON WITH INTENSIVE VIDEO MONITORING

Seventy-three seizures in 18 epilepsy patients were studied by analyzi ng the ictal findings of 8-channel ambulatory EEG (A/EEG) and adjacent 16-channel intensive videomonitoring (IVM). With IVM and A/EEG analys is, accuracy was excellent for determining the lateralization of seizu re progression; whereas at seizure onset and post-ictal slowing, accur acy was poor. No false lateralization was found in A/EEG compared with IVM or lateralization according to patient data, and in seizure later alization the interpretation of A/EEG was discordant in only 3 seizure s with IVM analysis. According to our study, ictal 8-channel A/EEG wit h sphenoidal electrodes is not suitable for localization of temporal l obe foci, but is reliable for lateralization analysis.